Respuesta :

Answer:

  • 12x + 5

Step-by-step Solution:

  • (3x + 7) + (9x − 2)

[Opening the brackets]

  • => 3x + 7 + 9x - 2

[Combining Like terms]

  • => (3x + 9x) + (7 - 2)

[Simplifying]

  • => 12x + 5

Let's add

[tex]\\ \tt\hookrightarrow 3x+7+(9x-2)[/tex]

  • Remove brackets

[tex]\\ \tt\hookrightarrow 3x+7+9x-2[/tex]

Combine like variables

[tex]\\ \tt\hookrightarrow 3x+9x+7-2[/tex]

[tex]\\ \tt\hookrightarrow 12x+5[/tex]